I have some raw binary files from a multibeam sonar system, I would like to try and read the header information out of these files.

A sample of the file would probably help.

 

 

There are a couple of different things you can do.

 

If you know the structure of the file, I highly recommend the FileRawDataFetcher custom transformer.

 

For example an interpretation specifier of '22, string(9);32,string(7)' would return

 

_rawdata{0}.value' has value `WLZ=0.566'

 

_rawdata{1}.value' has value `SMH=105

 

or

'26, string(5);36,string(3)' would return

 

`_rawdata{0}.value' has value `0.566'

 

`_rawdata{1}.value' has value `105'

 

and you could rename _rawdata{0} to WLZ and _rawdata{1} to SMH

If you don't, assuming the header information you want is all on line one, you could use the DataFile reader, set the Max Features to Read to 1 and then use an AttributeSplitter (,) on the data_file_data, which would return

 

`_list{0}' has value 'b????I.É3ñÌZ??i??????WLZ=0.566'

 

`_list{1}' has value `SMH=105'

 

`_list{2}' has value `STC=0'

 

etc.

You would need to cleanup the first and last elements of the list

There are a couple of different things you can do.

 

If you know the structure of the file, I highly recommend the FileRawDataFetcher custom transformer.

 

For example an interpretation specifier of '22, string(9);32,string(7)' would return

 

_rawdata{0}.value' has value `WLZ=0.566'

 

_rawdata{1}.value' has value `SMH=105

 

or

'26, string(5);36,string(3)' would return

 

`_rawdata{0}.value' has value `0.566'

 

`_rawdata{1}.value' has value `105'

 

and you could rename _rawdata{0} to WLZ and _rawdata{1} to SMH

If you don't, assuming the header information you want is all on line one, you could use the DataFile reader, set the Max Features to Read to 1 and then use an AttributeSplitter (,) on the data_file_data, which would return

 

`_list{0}' has value 'b????I.É3ñÌZ??i??????WLZ=0.566'

 

`_list{1}' has value `SMH=105'

 

`_list{2}' has value `STC=0'

 

etc.

You would need to cleanup the first and last elements of the list

Learned something new today, thanks @jdh!